Orius insidiosus (Say, 1832) (Heteroptera, Anthocoridae): sensibilidade ao fotoperíodo e diapausa reprodutiva?

Abstract

ABSTRACT. Orius insidiosus (Say, 1832) (Heteroptera, Anthocoridae): sensitivity to diapause-inducting photoperiods? The minute pirate bugs, Orius spp., are known as predators on several pests as thrips, aphids, spider mites and whiteflies. Orius insidiosus is an important thrips predator, commercially used around the world. However, one of the main problems on biological control of thrips in temperate regions is the occurrence of reproductive diapause in Orius species. This characteristic promotes the interruption of biological control strategies when predators are exposed to short photoperiods. This research had as objective to evaluate the influence of different photoperiod conditions on eggs/nymphs and adults of O. insidiosus in laboratory. The trials were carried out through the combination of eggs/nymphs and adults reared under the photoperiods 10L:14D; 11L:13D; 12L:12D and 13L:11D, at 25±2ºC and 70±10% RH. The predators were maintained during their preimaginal development time under one of the photoperiods and, after being emerged as adults transferred to another photoperiod regime. The predator had a tendency to present longer development time under photoperiod 13L:11D. There was no influence of the different photoperiods conditions on the reproduction of O. insidiosus. The females laid eggs normally during all their lifetime. O. insidiosus is not sensitive to photoperiod evaluated and do not enter in reproductive diapause.

Effect of photoperiod on slow and fast developing individuals in aphidophagous ladybirds, Menochilus sexmaculatus and Propylea dissecta (Coleoptera: Coccinellidae)

“…The thermal requirements for development in many insects gradually vary during summer under the effect of changing daylength, which may have adaptive significance (Lopatina et al, 2011). In general, insect life attributes (Chocorosqui & Panizzi, 2003;Niva & Takeda, 2003;Silveira & Bueno, 2003;Amin & Kwon, 2011) including development (Ishida et al, 2003Macedo et al, 2003;Nakamura, 2003;Tokumaru & Abe, 2003;Berkvens et al, 2008) The objective of the study was to decipher: i) the change in ratio of slow and fast developing individuals in a cohort with changing photoperiod, and ii) the variation in developmental and reproductive attributes of these developmental types. Through results we hope to gain an insight into the environmental control over the phenomena.…”

“…The thermal requirements for development in many insects gradually vary during summer under the effect of changing day‐length, which may have adaptive significance (Lopatina et al ., ). In general, insect life attributes (Chocorosqui & Panizzi, ; Niva & Takeda, ; Silveira & Bueno, ; Amin & Kwon, ) including development (Ishida et al ., ; Macedo et al ., ; Nakamura & Numata, 2003; Tokumaru & Abe, ; Berkvens et al ., ) are strongly influenced by photoperiods.…”

<b>Behavior of <i>Orius insidiosus</i> preying on <i>Aphis gossypii</i> reared on transgenic and conventional cotton varieties

“…However, an increase in the aphid population in China has led to the emergence of aphids as key pests, despite the use of this genetically modified cotton variety (DENG et al, 2003). This phenomenon may have been caused by changes in tri-trophic interactions in the agro-ecosystem or by unanticipated pleiotropy in transgenic plant varieties (SUJII et al, 2013).…”

Tabelas De Vida De Orius Insidiosus (Say, 1832) (Hemiptera: Anthocoridae) Predando Aphis Gossypii Glover, 1877 (Hemiptera: Aphididae) Em Diferentes Cultivares De Algodoeiro

“…A espécie Orius insidiosus é considerada generalista, possuindo habilidade de se alimentar de diferentes presas e substratos e de se abrigar em diferentes agroecossistemas, o que a torna apta à exploração do ecossistema e a sobreviver naturalmente (SILVEIRA et al, 2003). Esses percevejos possuem certas características que os tornam promissores agentes de controle biológico, destacando-se a alta eficiência de busca, habilidade para aumentar a população e agregar-se rapidamente quando há presas em abundância, além de sobreviver em baixa densidade de presas (BUSH et al, 1993).…”